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Thread: Electrical Riser Rooms

  1. #1
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    Electrical Riser Rooms

    Trying to find code on thru floor requirements for fire rating around either the cables or duct banks?
    CircuitRyder --- Unfortunately not all good ideas are code enforceable.

  2. #2
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    300.21
    Ron

  3. #3
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    Quote Originally Posted by ron View Post
    300.21

    Agree
    circumstances have all electrical riser rooms stacked directly above each other --- all walls have appropriate fire ratings from floor deck to ceiling deck (typically concrete over steel decking) -- are penetrations thru floor/ceiling decks considered to be penetrating a fire rated assembly?
    CircuitRyder --- Unfortunately not all good ideas are code enforceable.

  4. #4
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    Quote Originally Posted by mwm1752 View Post
    Agree
    circumstances have all electrical riser rooms stacked directly above each other --- all walls have appropriate fire ratings from floor deck to ceiling deck (typically concrete over steel decking) -- are penetrations thru floor/ceiling decks considered to be penetrating a fire rated assembly?
    Yes, if the floor/ceiling decks are indeed fire rated assemblies, which is virtually certain.
    The more they overthink the plumbing, the easier it is to stop up the drain

  5. #5
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    What is by definition with walls rated as such would create a shaft -- A shaft could have any type of floor/ceiling platform (corregated steel) that would not be rated so why would the choice of using a concrete decking type floor/ceiling have to be rated?
    CircuitRyder --- Unfortunately not all good ideas are code enforceable.

  6. #6
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    Quote Originally Posted by mwm1752 View Post
    What is by definition with walls rated as such would create a shaft -- A shaft could have any type of floor/ceiling platform (corregated steel) that would not be rated so why would the choice of using a concrete decking type floor/ceiling have to be rated?
    If it has a floor, it is a room, not a shaft. Grating is not a floor.
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    The more they overthink the plumbing, the easier it is to stop up the drain

  7. #7
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    we are talking fire protection being in place on all sides and a hole through a floor would be an opening in successive floors -- why would a grated surface not be a floor? I think we agree if the assembly is rated it should be addressed is as far as the NEC goes -- the interpretation of the assemblies(floor/ceiling ) fire rating or not is a building issue.
    CircuitRyder --- Unfortunately not all good ideas are code enforceable.

  8. #8
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    2 pics tell different tales
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    CircuitRyder --- Unfortunately not all good ideas are code enforceable.

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